Mary also received special messages of congratulations from her international boss Sarina Wiegman, Lionesses record cap holder Fara Williams and United legend Peter Schmeichel.
The latter opened his video by explaining how satisfying it is to see a fellow goalkeeper win such an award.
“Hi Mary, it’s Peter Schmeichel here. What a great achievement, Women’s Footballer of the Year,” the Great Dane began.
“It doesn’t happen very often to goalkeepers, winning Player of the Year. It’s always the girls and guys scoring the goals, not the ones who prevent them.
“You are making our club Manchester United so very proud.”
We’ll second that sentiment. Congratulations, Mary, on your latest award!